Breast milk

Definition

Breast milk is a nutrient-rich fluid produced by the mammary glands of mammals to feed their young. It contains antibodies and immune cells that provide passive immunity to infants.

5 Must Know Facts For Your Next Test

1. Breast milk contains IgA antibodies that protect mucosal surfaces in infants.
2. It includes various immune cells such as macrophages, lymphocytes, and neutrophils.
3. Lactoferrin in breast milk has antimicrobial properties that inhibit bacterial growth.
4. Breastfeeding helps establish the infant's gut microbiota, which is crucial for developing a robust immune system.
5. Components of breast milk can influence the development of the infant's adaptive immune system.

Review Questions

• What type of antibodies in breast milk protect an infant's mucosal surfaces?
• Name two types of immune cells found in breast milk.
• How does lactoferrin in breast milk contribute to an infant’s immunity?

Related terms

IgA Antibodies: Immunoglobulin A (IgA) are antibodies that play a critical role in mucosal immunity.

Passive Immunity: The transfer of active humoral immunity in the form of ready-made antibodies from one individual to another.

Gut Microbiota: The community of microorganisms living in the gastrointestinal tract, important for digestion and immune function.